Results 41 to 50 of about 28,634 (306)

Approximation of GBS Type q-Jakimovski-Leviatan-Beta Integral Operators in Bögel Space

open access: yesMathematics, 2022
In the present article, we introduce the bivariate variant of Beta integral type operators based on Appell polynomials via q-calculus. We study the local and global type approximation properties for these new operators.
Abdullah Alotaibi
doaj   +1 more source

Approximation by One and Two Variables of the Bernstein-Schurer-Type Operators and Associated GBS Operators on Symmetrical Mobile Interval

open access: yesJournal of Function Spaces, 2021
In this article, we purpose to study some approximation properties of the one and two variables of the Bernstein-Schurer-type operators and associated GBS (Generalized Boolean Sum) operators on a symmetrical mobile interval.
Reşat Aslan, Aydın İzgi
doaj   +1 more source

Multiple Factorizations of Bivariate Linear Partial Differential Operators

open access: yes, 2009
We study the case when a bivariate Linear Partial Differential Operator (LPDO) of orders three or four has several different factorizations. We prove that a third-order bivariate LPDO has a first-order left and right factors such that their symbols are
A.V. Zhiber   +16 more
core   +1 more source

Characterisation of matrix entropies [PDF]

open access: yes, 2015
The notion of matrix entropy was introduced by Tropp and Chen with the aim of measuring the fluctuations of random matrices. It is a certain entropy functional constructed from a representing function with prescribed properties, and Tropp and Chen gave ...
Hansen, Frank, Zhang, Zhihua
core   +1 more source

Derivatives pricing in energy markets: an infinite dimensional approach [PDF]

open access: yes, 2014
Based on forward curves modelled as Hilbert-space valued processes, we analyse the pricing of various options relevant in energy markets. In particular, we connect empirical evidence about energy forward prices known from the literature to propose ...
Benth, Fred Espen, Krühner, Paul
core   +3 more sources

Bivariate Bannai-Ito polynomials

open access: yes, 2018
A two-variable extension of the Bannai-Ito polynomials is presented. They are obtained via $q\to-1$ limits of the bivariate $q$-Racah and Askey-Wilson orthogonal polynomials introduced by Gasper and Rahman. Their orthogonality relation is obtained. These
Lemay, Jean-Michel, Vinet, Luc
core   +1 more source

Preparation and measurement: two independent sources of uncertainty in quantum mechanics [PDF]

open access: yes, 1999
In the Copenhagen interpretation the Heisenberg uncertainty relation is interpreted as the mathematical expression of the concept of complementarity, quantifying the mutual disturbance necessarily taking place in a simultaneous or joint measurement of ...
de Muynck, Willem M.
core   +4 more sources

Order-Degree Curves for Hypergeometric Creative Telescoping

open access: yes, 2012
Creative telescoping applied to a bivariate proper hypergeometric term produces linear recurrence operators with polynomial coefficients, called telescopers. We provide bounds for the degrees of the polynomials appearing in these operators.
Chen, Shaoshi, Kauers, Manuel
core   +1 more source

On a Five-Parameter Mittag-Leffler Function and the Corresponding Bivariate Fractional Operators

open access: yesFractal and Fractional, 2021
Several extensions of the classical Mittag-Leffler function, including multi-parameter and multivariate versions, have been used to define fractional integral and derivative operators.
Mehmet Ali Özarslan, Arran Fernandez
doaj   +1 more source

Bivariate $t$-distribution for transition matrix elements in Breit-Wigner to Gaussian domains of interacting particle systems

open access: yes, 2005
Interacting many-particle systems with a mean-field one body part plus a chaos generating random two-body interaction having strength $\lambda$, exhibit Poisson to GOE and Breit-Wigner (BW) to Gaussian transitions in level fluctuations and strength ...
C. H. Lewenkopf   +8 more
core   +1 more source

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